How to Undercut a Door Frame When Installing Laminate Flooring

Written by larry simmons
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How to Undercut a Door Frame When Installing Laminate Flooring
This door frame in an entry off the hall was undercut to allow the flooring planks through. (Jupiterimages/Creatas/Getty Images)

Laying laminate flooring often requires that you span adjoining rooms without breaking the flooring pattern. When doing so necessitates going through a doorway, you must undercut the door frame to make allowances for the laminate's passing beneath. The cuts are small and unobtrusive, meant to remove the difficulty of shaping the side of a laminate board to match each door frame's shape. With saw and chisel, you can make the room you need and quickly place the boards through the doorway, continuing the flooring pattern uninterrupted to preserve the floor's continuity across the space.

Skill level:
Moderately Easy

Things you need

  • Utility knife
  • Underlayment
  • Floorboard
  • Table saw
  • Pencil
  • Jamb saw
  • Hammer
  • Chisel

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  1. 1

    Use a utility knife to cut a strip of any underlayment used beneath the laminate flooring from the end of the underlayment roll. Make the strip about the same width as the board and about 1 foot in length. Cut a piece from the end of one of the floorboards as well, about the same length as the underlayment, using a table saw.

  2. 2

    Lay the underlayment on the floor at the base of the door frame and place the flooring piece atop it so their combined height is the same as the planned height of the laminate flooring when installed.

  3. 3

    Press the stacked pieces snugly against the base of the frame. Mark their combined height onto the frame with a pencil. Repeat the process on the other side of the frame.

  4. 4

    Use a jamb saw to cut through the door frame at the height of the pencil line. Cut completely through the frame to the wall beneath. Remove the saw and use a chisel and hammer to remove the cut portion, making the slit on each side of the door as clean as possible for passing the flooring beneath.

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